<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登陆表单区域 -->
      <el-form
        label-width="0px"
        :rules="loginFormRules"
        ref="loginFormRef"
        :model="loginForm"
        class="login_form"
      >
        <el-form-item prop="username">
          <!-- 用户名 -->
          <el-input
            v-model="loginForm.username"
            prefix-icon="icon iconfont icon-users"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <!-- 密码 -->
          <el-input
            v-model="loginForm.password"
            type="password"
            prefix-icon="icon iconfont icon-password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data () {
    return {
      // 登录表单的数据对象
      loginForm: {
        username: '',
        password: ''
      },
      //   表单验证规则
      loginFormRules: {
        // 验证用户名
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符之间',
            trigger: 'change'
          }
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符之间',
            trigger: 'change'
          }
        ]
      }
    }
  },
  methods: {
    resetLoginForm () {
      console.log('resetLoginForm', this)
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) {
          return ''
        }
        const result = await this.$http.post('login', this.loginForm)
        console.log(result)
        const { data: res } = result
        // console.log(res.meta.msg)
        if (res.meta.status !== 200) {
          // return console.log('登录失败')
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        // 1. 将登录成功后的 token 保存到客户端的 sessionStorage
        // 1.1 其他的API接口，必须在登录之后才能访问
        // 1.2 token 只应在当前网站打开期间生效，所以将 token 保存在sessionStorage
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.replace('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    border: 1px solid #eee;
    border-radius: 50%;
    height: 130px;
    width: 130px;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  width: 100%;
  position: absolute;
  bottom: 0;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
